S
M
T
W
T
F
S
29
46°
27°
30
45°
26°
1
37°
26°
2
44°
25°
3
38°
25°
4
36°
24°
5
40°
25°
6
39°
25°
7
39°
24°
8
41°
24°
9
38°
23°
10
35°
24°
11
34°
22°
12
33°
21°
13
30°
20°
14
29°
22°
15
35°
22°
16
35°
21°
17
38°
22°
18
37°
21°
19
37°
21°
20
31°
20°
21
30°
20°
22
35°
21°
23
36°
19°
24
30°
18°
25
22°
10°
26
26°
13°
27
28°
12°
28
29°
14°
29
30°
10°
30
29°
2°
31
25°
1°
1
17°
1°
2
18°
2°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Clarion
Clarion's December 2026 forecast shows daily high temperatures ranging from 17° to 46°, with overnight lows between 1° and 27°. The average high for December is 33° with an average low of 19°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Clarion. See also: January | February | March.
